package com.atguigu.demojuc.chap09;

import java.util.concurrent.atomic.AtomicInteger;

public class AtomicDemo_ {
    public static void main(String[] args) {
        //乐观锁原理：比较和交换
        AtomicInteger i = new AtomicInteger(1);
        //比较当前值initialValue 1 和预期值expectedValue 1 ,相等，则将当前值换为新值
        System.out.println(("第一次更新：" + i.compareAndSet(1, 200)));
        System.out.println(("第一次更新后i的值：" + i.get()));

        System.out.println(("第二次更新：" + i.compareAndSet(1, 300)));
        System.out.println(("第二次更新后i的值：" + i.get()));

        System.out.println(("第三次更新：" + i.compareAndSet(200, 300)));
        System.out.println(("第三次更新后i的值：" + i.get()));

    }
}
